by the same token, romney can go after obama because obama's talked about reducing the corporate rate to 28%, but he hasn't specified how he'd pay for it. and then you have the issue of jobs. romney talks about the job record on net from the beginning of president obama's term. and if you do that, it's just about even. maybe a few jobs in the positive territory. but barack obama talks about what's happened since early 2010 since the turnaround started. they'll clash on that. on medicare, the big entitlement spending issue that threatens the bunch the long term. mitt romney's proposed with paul ryan an ambitious reformation of the program that would go to voucher, but he hasn't said what the level of the voucher would be or the growth rate in the voucher. if you don't specify that, you can't specify what your savings will be or the impact on consumers. and finally president obama last year in the grand bargain talks with house speaker boehner talked about more ambitious proposals than medicare than he's advocated so far like raising the eligibility age from 65 to 67. hasn't said a word